/* Matéria Viva — biogasbr.digital */
/* Design: independent-blog | startup-charcoal | mono-accent-labels */

:root {
  --mv-bg: #f6f5f3;
  --mv-surface: #ffffff;
  --mv-charcoal: #1c1c1e;
  --mv-charcoal-soft: #3a3a3c;
  --mv-charcoal-muted: #6b6b6e;
  --mv-border: #d8d6d2;
  --mv-border-light: #ebe9e5;
  --mv-accent: #2d4a3e;
  --mv-accent-soft: #e8f0ec;
  --mv-overlay: rgba(28, 28, 30, 0.62);
  --mv-font-body: "Georgia", "Times New Roman", serif;
  --mv-font-mono: "SF Mono", "Menlo", "Consolas", monospace;
  --mv-container: 720px;
  --mv-radius: 0;
  --mv-gap-tight: 0.75rem;
  --mv-gap: 1.25rem;
  --mv-gap-wide: 2rem;
  --mv-transition: 0.2s ease;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 17px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--mv-font-body);
  background: var(--mv-bg);
  color: var(--mv-charcoal);
  line-height: 1.65;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

img,
svg {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: var(--mv-accent);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--mv-transition);
}

a:hover {
  color: var(--mv-charcoal);
}

/* ——— Header: minimal-header ——— */
.mv-header {
  background: var(--mv-surface);
  border-bottom: 1px solid var(--mv-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.mv-header__inner {
  max-width: var(--mv-container);
  margin: 0 auto;
  padding: var(--mv-gap-tight) 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--mv-gap);
}

.mv-logo {
  font-family: var(--mv-font-body);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--mv-charcoal);
  text-decoration: none;
  letter-spacing: -0.02em;
  white-space: nowrap;
}

.mv-logo:hover {
  color: var(--mv-accent);
}

.mv-logo__tag {
  display: block;
  font-family: var(--mv-font-mono);
  font-size: 0.6rem;
  font-weight: 400;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--mv-charcoal-muted);
  margin-top: 0.1rem;
}

/* Nav: horizontal-pill-active */
.mv-nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.mv-nav__list {
  display: flex;
  list-style: none;
  gap: 0.15rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.mv-nav__link {
  font-family: var(--mv-font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--mv-charcoal-muted);
  padding: 0.35rem 0.7rem;
  border-radius: var(--mv-radius);
  border: 1px solid transparent;
  transition: all var(--mv-transition);
}

.mv-nav__link:hover {
  color: var(--mv-charcoal);
  background: var(--mv-border-light);
}

.mv-nav__link--active {
  color: var(--mv-charcoal);
  background: var(--mv-charcoal);
  color: var(--mv-surface);
  border-color: var(--mv-charcoal);
}

.mv-nav__link--active:hover {
  background: var(--mv-charcoal-soft);
  color: var(--mv-surface);
}

.mv-menu-toggle {
  display: none;
  background: none;
  border: 1px solid var(--mv-border);
  padding: 0.4rem 0.55rem;
  cursor: pointer;
  font-family: var(--mv-font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--mv-charcoal);
  border-radius: var(--mv-radius);
}

.mv-menu-toggle:hover {
  background: var(--mv-border-light);
}

/* ——— Main layout ——— */
.mv-main {
  flex: 1;
  width: 100%;
}

.mv-container {
  max-width: var(--mv-container);
  margin: 0 auto;
  padding: 0 1rem;
}

.mv-container--narrow {
  max-width: 600px;
}

/* ——— Hero: full-width-image + overlay ——— */
.mv-hero {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 7;
  min-height: 220px;
  max-height: 420px;
  overflow: hidden;
  background: var(--mv-charcoal);
}

.mv-hero__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.85;
}

.mv-hero__overlay {
  position: absolute;
  inset: 0;
  background: var(--mv-overlay);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 1.5rem 1rem 2rem;
}

.mv-hero__content {
  max-width: var(--mv-container);
  margin: 0 auto;
  width: 100%;
}

.mv-hero__label {
  font-family: var(--mv-font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 0.5rem;
}

.mv-hero__title {
  font-size: clamp(1.5rem, 4vw, 2.1rem);
  font-weight: 700;
  color: #fff;
  line-height: 1.2;
  letter-spacing: -0.02em;
  max-width: 28ch;
}

.mv-hero__desc {
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.85);
  margin-top: 0.6rem;
  max-width: 42ch;
  line-height: 1.5;
}

/* ——— Section blocks ——— */
.mv-section {
  padding: var(--mv-gap-wide) 0;
}

.mv-section--tight {
  padding: var(--mv-gap) 0;
}

.mv-section__header {
  margin-bottom: var(--mv-gap);
  padding-bottom: var(--mv-gap-tight);
  border-bottom: 1px solid var(--mv-border);
}

.mv-section__label {
  font-family: var(--mv-font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--mv-charcoal-muted);
  margin-bottom: 0.35rem;
}

.mv-section__title {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.25;
}

.mv-section__intro {
  margin-top: 0.5rem;
  color: var(--mv-charcoal-soft);
  font-size: 0.95rem;
}

/* ——— Article list: numbered-list ——— */
.mv-feed {
  list-style: none;
  counter-reset: feed-counter;
}

.mv-feed__item {
  counter-increment: feed-counter;
  border-bottom: 1px solid var(--mv-border);
  padding: var(--mv-gap) 0;
}

.mv-feed__item:first-child {
  padding-top: 0;
}

.mv-feed__item:last-child {
  border-bottom: none;
}

/* Cards: stacked-text-below */
.mv-card {
  display: flex;
  flex-direction: column;
  gap: var(--mv-gap-tight);
}

.mv-card__thumb-wrap {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--mv-border-light);
  border: 1px solid var(--mv-border);
}

.mv-card__thumb {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.88) contrast(0.95);
}

.mv-card__body {
  display: flex;
  gap: var(--mv-gap-tight);
  align-items: flex-start;
}

.mv-card__number {
  font-family: var(--mv-font-mono);
  font-size: 0.75rem;
  color: var(--mv-charcoal-muted);
  flex-shrink: 0;
  padding-top: 0.15rem;
  min-width: 1.5rem;
}

.mv-card__number::before {
  content: counter(feed-counter, decimal-leading-zero);
}

.mv-card__content {
  flex: 1;
}

.mv-card__meta {
  font-family: var(--mv-font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--mv-charcoal-muted);
  margin-bottom: 0.3rem;
}

.mv-card__title {
  font-size: 1.1rem;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.mv-card__title a {
  color: var(--mv-charcoal);
  text-decoration: none;
}

.mv-card__title a:hover {
  color: var(--mv-accent);
  text-decoration: underline;
}

.mv-card__excerpt {
  font-size: 0.9rem;
  color: var(--mv-charcoal-soft);
  margin-top: 0.4rem;
  line-height: 1.55;
}

/* Author: minimal-name-only */
.mv-author {
  font-family: var(--mv-font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.04em;
  color: var(--mv-charcoal-muted);
  margin-top: 0.5rem;
}

.mv-author a {
  color: var(--mv-charcoal-muted);
  text-decoration: none;
}

.mv-author a:hover {
  color: var(--mv-accent);
  text-decoration: underline;
}

/* ——— Prose / article narrow-reading ——— */
.mv-prose {
  font-size: 1rem;
  line-height: 1.7;
}

.mv-prose > * + * {
  margin-top: 1.1rem;
}

.mv-prose h2 {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-top: 2rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--mv-border-light);
}

.mv-prose h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-top: 1.5rem;
}

.mv-prose p {
  color: var(--mv-charcoal-soft);
}

.mv-prose ul,
.mv-prose ol {
  padding-left: 1.25rem;
  color: var(--mv-charcoal-soft);
}

.mv-prose li + li {
  margin-top: 0.35rem;
}

.mv-prose blockquote {
  border-left: 2px solid var(--mv-charcoal);
  padding: 0.5rem 0 0.5rem 1rem;
  font-style: italic;
  color: var(--mv-charcoal-muted);
}

.mv-prose a {
  color: var(--mv-accent);
}

/* Article header */
.mv-article-header {
  padding: var(--mv-gap-wide) 0 var(--mv-gap);
  border-bottom: 1px solid var(--mv-border);
  margin-bottom: var(--mv-gap);
}

.mv-article-header__label {
  font-family: var(--mv-font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--mv-charcoal-muted);
  margin-bottom: 0.5rem;
}

.mv-article-header__title {
  font-size: clamp(1.5rem, 4vw, 2rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.03em;
}

.mv-article-header__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  margin-top: 0.75rem;
  font-family: var(--mv-font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--mv-charcoal-muted);
}

.mv-article-figure {
  margin: var(--mv-gap) 0;
  border: 1px solid var(--mv-border);
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--mv-border-light);
}

.mv-article-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.88);
}

.mv-article-figure figcaption {
  font-family: var(--mv-font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.04em;
  color: var(--mv-charcoal-muted);
  padding: 0.5rem 0.75rem;
  background: var(--mv-surface);
  border-top: 1px solid var(--mv-border);
}

.mv-article-footer {
  margin-top: var(--mv-gap-wide);
  padding-top: var(--mv-gap);
  border-top: 1px solid var(--mv-border);
}

.mv-updated {
  font-family: var(--mv-font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--mv-charcoal-muted);
  margin-top: var(--mv-gap);
}

/* Related articles */
.mv-related {
  margin-top: var(--mv-gap-wide);
  padding-top: var(--mv-gap);
  border-top: 1px solid var(--mv-border);
}

.mv-related__title {
  font-family: var(--mv-font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--mv-charcoal-muted);
  margin-bottom: var(--mv-gap-tight);
}

.mv-related__list {
  list-style: none;
}

.mv-related__list li + li {
  margin-top: 0.5rem;
}

.mv-related__list a {
  font-size: 0.95rem;
  color: var(--mv-charcoal);
  text-decoration: none;
}

.mv-related__list a:hover {
  color: var(--mv-accent);
  text-decoration: underline;
}

/* ——— Page header (inner pages) ——— */
.mv-page-header {
  padding: var(--mv-gap-wide) 0 var(--mv-gap);
  border-bottom: 1px solid var(--mv-border);
  margin-bottom: var(--mv-gap);
}

.mv-page-header__label {
  font-family: var(--mv-font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--mv-charcoal-muted);
  margin-bottom: 0.4rem;
}

.mv-page-header__title {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

/* ——— Contact form (editorial, no buttons style — links only) ——— */
.mv-contact-block {
  background: var(--mv-surface);
  border: 1px solid var(--mv-border);
  padding: var(--mv-gap);
  margin: var(--mv-gap) 0;
}

.mv-contact-block__label {
  font-family: var(--mv-font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--mv-charcoal-muted);
  margin-bottom: 0.35rem;
}

.mv-contact-block__value {
  font-size: 1rem;
}

.mv-contact-block__value a {
  color: var(--mv-charcoal);
  font-weight: 700;
}

/* ——— Footer: minimal-single ——— */
.mv-footer {
  background: var(--mv-charcoal);
  color: rgba(255, 255, 255, 0.65);
  margin-top: auto;
  padding: var(--mv-gap) 1rem;
  font-size: 0.8rem;
}

.mv-footer__inner {
  max-width: var(--mv-container);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--mv-gap-tight);
  align-items: center;
  text-align: center;
}

.mv-footer__brand {
  font-weight: 700;
  color: #fff;
  font-size: 0.9rem;
}

.mv-footer__links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem 1rem;
  list-style: none;
}

.mv-footer__links a {
  font-family: var(--mv-font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.55);
  text-decoration: none;
}

.mv-footer__links a:hover {
  color: #fff;
}

.mv-footer__copy {
  font-family: var(--mv-font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.04em;
  color: rgba(255, 255, 255, 0.4);
}

/* ——— Cookie: corner-popup ——— */
.mv-cookie {
  position: fixed;
  bottom: 1rem;
  right: 1rem;
  max-width: 300px;
  background: var(--mv-charcoal);
  color: rgba(255, 255, 255, 0.85);
  padding: 1rem;
  border: 1px solid var(--mv-charcoal-soft);
  z-index: 1000;
  font-size: 0.8rem;
  line-height: 1.5;
  transform: translateY(120%);
  opacity: 0;
  transition: transform 0.35s ease, opacity 0.35s ease;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.2);
}

.mv-cookie--visible {
  transform: translateY(0);
  opacity: 1;
}

.mv-cookie__text {
  margin-bottom: 0.75rem;
}

.mv-cookie__text a {
  color: rgba(255, 255, 255, 0.9);
}

.mv-cookie__actions {
  display: flex;
  gap: 0.75rem;
  align-items: center;
}

.mv-cookie__accept {
  font-family: var(--mv-font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  background: #fff;
  color: var(--mv-charcoal);
  border: none;
  padding: 0.4rem 0.75rem;
  cursor: pointer;
  border-radius: var(--mv-radius);
}

.mv-cookie__accept:hover {
  background: var(--mv-border-light);
}

.mv-cookie__link {
  font-family: var(--mv-font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.55);
  text-decoration: none;
}

.mv-cookie__link:hover {
  color: #fff;
}

/* ——— Articles archive list ——— */
.mv-archive-list {
  list-style: none;
}

.mv-archive-list__item {
  border-bottom: 1px solid var(--mv-border);
  padding: var(--mv-gap) 0;
}

.mv-archive-list__item:first-child {
  padding-top: 0;
}

.mv-archive-list__date {
  font-family: var(--mv-font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--mv-charcoal-muted);
  margin-bottom: 0.3rem;
}

.mv-archive-list__title {
  font-size: 1.05rem;
  font-weight: 700;
}

.mv-archive-list__title a {
  color: var(--mv-charcoal);
  text-decoration: none;
}

.mv-archive-list__title a:hover {
  color: var(--mv-accent);
  text-decoration: underline;
}

.mv-archive-list__excerpt {
  font-size: 0.88rem;
  color: var(--mv-charcoal-soft);
  margin-top: 0.35rem;
}

/* ——— Mobile ——— */
@media (max-width: 640px) {
  .mv-menu-toggle {
    display: block;
  }

  .mv-nav__list {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--mv-surface);
    border-bottom: 1px solid var(--mv-border);
    flex-direction: column;
    padding: 0.5rem 1rem 1rem;
    gap: 0;
  }

  .mv-nav__list--open {
    display: flex;
  }

  .mv-nav__link {
    display: block;
    padding: 0.6rem 0.5rem;
    width: 100%;
  }

  .mv-header__inner {
    position: relative;
    flex-wrap: wrap;
  }

  .mv-nav {
    margin-left: auto;
  }

  .mv-hero {
    aspect-ratio: 4 / 3;
    max-height: none;
  }

  .mv-cookie {
    left: 1rem;
    right: 1rem;
    max-width: none;
  }
}

@media (min-width: 641px) {
  .mv-card__thumb-wrap {
    max-width: 100%;
  }
}